Apparatus for coating



w. J. EISNER APPARATUS FOR comma Filed Sept. 11. 1931 3 Sheets-Sheet l eN f M Br P Y ATTORNEYS 8 Sept. 27, 1932. w. J. EISNER APPARATUS FORCOATING 5 Sheebs-Sheet 2 Sept. 27, 1932 w. J EISNER APPARATUS FORCOATING Filed Sept. 11. 1951 3iSheets-Shieet-;

A TTOR/VEV Patented Sept. 27, 1932 UNITED STATES PATENT? OFFICE WILLIAMJ. EISNER, OF NEWARK, NEW JERSEY, ASSIGNOR TO NEWARK PARAFFINE &PARCHMENT PAPER C0,, 013 NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEYAPPARATUS FOR COATING Application filed September 11, 1931. Serial No.562,362.

This invention relates to coating and more particularly to a method andapparatus whereby a strip of paper, fabric, leather and other materialmay be very effectively coated with paratfine, wax, gum, solvents,sizings, colorings, clay, resin, and like preservative material or anyother material or combination thereof suitable to the material or thepurpose for which the coated material is to be used.

One object of the invention is to provide a method and apparatus wherebya strip of material may be evenly coated while in constant motionthrough the apparatus and the coating material after being appliedquickly sets by passing the coated strip through a water or other fluidbath which serves very efiectively as a setting agent and retains thecoating in an evenly distributed condition upon the strip of material.

Another object of the invention is to permit the water to be removedfrom the coated strip after it passes out of the water or other fluidbath, thereby causing the coated strip to quickly dry.

Another object of the invention is to provide improved scrapers forremoving water from rollers engaged by the coated strip and so constructthe scrapers that as water is removed from the rollers it may bereturned to the water compartment for reuse and thereby eliminate thenecessity of refurnishing the water supply except after comparativelylong intervals of time.

Another object of the invention is to provide a machine of thischaracter wherein the strip of material is trained about idler rollersso arranged that the strip will be caused to travel a suflicientdistance after leaving the water bath to permit water adhering to thestrip to be removed and the strip thoroughly dried before the coatedstrip is formed in a roll at the delivery end of the apparatus.

Another object of the invention is to provide an apparatus of thischaracter consisting of cooperating units which may be set up in properrelation to each other. Therefore, the apparatus may be easily set upand also conveniently moved from one place to another.

Another object of the invention is to so 10- cate rollers about whichthe strip of material is trained after being coated that the strip willmove in a tortuous path from one roller to another and move in anarcuate path about each roller, thereby setting up a series ofcentrifugal forces which will greatly assist in drying the strip.

The invention is illustrated in the accompanyin g dra Win gs, whereinFigure 1 is a side elevation of the improved coating apparatus.

Figure 2 is a top plan view of the same.

Figure 3 is a sectional view taken longitudinally through the coatingapparatus.

Figure 4 is a fragmentary perspective view illustrating the constructionof scrapers which engage rollers forming part of the apparatus.

This improved coating apparatus is em ployed as means for coating amoving strip of material with a coating which is in a liquid state whenapplied to the stri and is set by being passed through a water ath, thewater being then removed from the coated strip and the coated strip whenthoroughly dried delivered from the apparatus in a roll or sheet of anysize desired.

This improved apparatus consists of three cooperating units indicated ingeneral by the numerals 1, 2 and 3, the unit 1 constltuting a coatingunit, the unit 2 a setting and drying unit and the unit 3 a deliveryunit in which a final drying operation takes place and the coated stripis formed in a roll or sheet. The three units are disposed in end to endrelation to each other and motion transmitted from one unit to anotherso that rollers of the units will be rotated. A motor 4- which may be an.electric motor or any other type desired and is mounted adjacent tounit 1 constitutes the source of power. By this arrangement the rollersof the three units will operate in proper timed relation to each otherand since all of the rollers with Which the strip of fabric or othermaterial engages are positively driven, drag upon the strip will beeliminated and also power necessary to operate the apparatus will bereduced to a minimum.

The unit 1 has a frame including side members or uprights 5 and 6between which extend cross bars 7 serving as a support for a pan orreservoir 8 in which a suitable quantity of coating material is placedas shown in Figure 3. Brackets 9 extend from the outer end or front endof the frame and serve as a support for a shaft 10 carrying a roll ofmaterial to be coated as shown at 11. By referring to Figure 1, it willbe seen that end portions of the shaft 10 are engaged in bearings 12carried by brackets 9 and it will also be seen that the bearings are ofsuch construction that the shaft may be easily removed when necessarybut will not be liable to accidentally slip out of place. A pulley 13for engagement by a drive belt 14 is provided at one end of the shaft 10in order that rotary motion may be imparted to the shaft and the stripof material to be coated easily unwound from the shaft.

A feed roller 15 extends transversely in the frame adjacent the inner orrear end thereof and has pinions at its ends rotatably engaged inbearings at the lower ends of standards 16 rising from the uprights 5and 6. Above the roller 15 is a pressing roller 17 rotatably mounted inbearing blocks 18 slidably mounted in the standards 16 and the blocksare provided with stems 19 which extend upwardly and carry beveled gears20 meshing with beveled gears 21 carried by a shaft 22. This shaft isrotatably mounted in bearings 23 fixed upon the standards 16 and at oneend carries a hand wheel 24 by means of which the shaft may be rotatedand rotary motion imparted to the stems 19 in order to vertically adjustthe blocks 18. Therefore, the roller 17 may be adjusted towards and awayfrom the roller 15 and pressure applied to the strip of material to becoated controlled. Companion gears 25 may be provided in order thatrotary motion may be transmitted from the roller 15 to the roller 17. Abelt 26 is engaged about pulleys upon the shaft of the motor 4 and theshaft at one end of the roller 15 serves to impart rotary motion to thisroller. The spindle or shaft at the other end of the roller 15 carries asprocket wheel 27 for-engagement by the main drive chain 28 through themedium of which rotary motion is to be transmitted to rollers of theunits 2 and 3.

The strip of material to be coated is engaged over a guide roller 29mounted in bearings 30 at opposite sides of the frame near the front endthereof, and then extends down into the container 8 in engagement withthe roller 31 before passing between the rollers 15 and 17. The roller31 is supported by arms 32 fixed upon a shaft 33 extending across theframemidway the length of the container 8 and rotatably mounted inbearings 34. One end of the shaft 33 projects outwardly from the frameand carries a latch lever 35 for engagement with a rack 36 and thereforethe roller 31 may be vertically adjusted and movement of the strip ofmaterial throu 'h the container guided. By vertically ad usting theroller 29 through the medium of the adjusting screws 37 tension may beapplied to the portion of the strip of material between the roll 10 andthe roller 15 and wrinkles prevented from forming. There has also beenprovided a tensioning roller 38 at the rear or inner end of the unit 1,which is vertically adjustable in order that the portion of the strip ofmaterial passing from the unit 1 to the unit 2 may be held undertension.

By referring to Figure 3, it will be seen that when the apparatus is inuse the strip of material to be coated passes from the roll 11 over theroller 29 and then downwardly beneath the roller 31 and upwardly betweenthe rollers 15 and 17 from which it passes over the roller 38. Theposition of the roller through the container 8 and insures movement ofthe strip through the coating material in the container. Therefore, thestrip of material will have both surfaces coated with the coatingmaterial. After leaving the container 8 the strip of material passesbetween the rollers 15 and 17 which serve to evenly distribute thecoating material upon the strip and also serve as pressing rollers toremove surplus coating material from the strip. This coating material,of course, flows back into the container. If the strip is formed ofabsorbent material the pressure applied by the rollers 15 and 17 willcause the strip to become impregnated with the coating material.

After leaving the unit 1 the strip of coated material moves to the unit2 where it moves through a bath consisting of water in a container 39mounted between the upright or side members 40 of the frame of the unit2. A coil 41 in the container or tank 39 serves to control temperatureof the water. Wipers 42 for engagement by the strip extend across theopen top of the tank 39 and through the tank below thewater levelthereof extends a guide roller 43 serving to insure passage of the stripthrough the water bath in order that the coating material will be set.Additional scrapers 44 and 45 are provided above the tank, the wiper 44being mounted upon a rod 46 and held in a set position by a suitablenumber of set screws 47 and the wiper 45 being mounted upon a rod 48having arms pivotally mounted at their upper ends as shown at 50 andreleasably secured in such position by set screws 51. The strip ofmaterial after leaving the water bath passes upwardly in engagement withthe wipers and then passes between rollers 52 and 53 serving as feedrollers. By properly adjusting the wipers as shown in Figure 3' theportion of the strip between the roller 43 and the rollers 52 and 53W11]. be placed under tension and the wipers .31 controls movement ofthe strip of material which are formed of rubber are similar to asqueegee in construction will serve very effectively to wipe water fromopposite faces of the strip although the water may not be entirelyremoved by these wipers. A pintle or stub axle at one end of the roller52 carries a sprocket wheel 54 over which is trained the upper flight ofthe sprocket chain 28 and the stub axle at the other end of this rollercarries a gear 55 meshing with a larger gear 56 upon the shaft of theroller 53. Therefore, the two rollers will be positively driven. Rotarymotion is also transmitted from the shaft of the roller 52 to a roller57 and from the roller 57 rotary motion will be transmitted to anotherroller 58 by gears 59 and 60. The rollers 57 and 58 are thereforepositively driven and motion will be imparted to the portion of thecoated strip which is trained about these rollers and then extendeddownwardly across an idler roller 61 towards the unit 3. It is desiredto have the strip pressed firmly against the roller 52 and therefore theroller 53 is rotatabl y mounted in blocks 62. These blocks are slidablyengaged in slots or openings 63 formed horizontally in the uprights 40and provided with threaded stems 64 having gears 65 at their endsmeshing with gears 66 upon a shaft 67 extending transversely of the unit2 and rotatably mounted in bearing brackets 68. When the shaft 67 isrotated by grasping its hand wheel 69 rotary motion willbe imparted tothe stems 64 and the roller 53 shifted towards or away from the roller52.

The delivery unit 3 also has a frame including the side members oruprights 7 0 and 71 between which extend rollers 72, 73 and 74 withwhich the strip of material is engaged before being formed into a roll75 about a shaft 76. The roller 73 is an idler roller but the rollers 72and 74 are to be positively driven and their axles carry interengaginggears 77 78. The gear meshes with a cooperation gear 79 upon the countershaft 80 which is rotatably supported by the upright 71 and a support 81and carries a sprocket wheel 82 about which is disposed the sprocketchain 28.

An idler sprocket 83 located between the sprocket 54 and the sprocket 82serves as a tightener to retain the sprocket chain in operativeengagement with the sprockets. The shaft 76 has one end coupled to ashaft 84 as shown at 85 and by referring to Figures 1 and 2 it will beseen that the shaft 84 is rotatably mounted in bearings at the upper endof a support 86 and carries a pulley 87 about which is engaged a belt88. This belt 88 is also engaged about the pulley 89 fixed upon theshaft 80 and a belt tightener 90 carried by the support 86 and engagedthe upper flight of the belt 88 serves to retain the belt under tension.

During operation of the apparatus water is liable to accumulate upon therollers 57, 58 and 74 and in order to remove this water there has beenprovided scrapers 91, 92, and 93. These scrapers are of a duplicateconstruction and each has a trough 94 having heads 95 at its ends fromwhich extend arms 96. The arms are pivotally mounted as shown at 97 tothe respective side members of the units 2 and 3 and are engaged bysprings 98 serving to draw the scrapers toward the rollers and yieldablyhold the blades 99 of the scrapers in close contacting engagement withthe same. Each blade has its ends engaged in seats 100 formed in theheads 95 and projects outwardly through a side opening formed in itstrough. Water scraped from the rollers by the blades flows across theblades into the troughs and escapes through drain pipes 101 and byreferring to Figure 3 it will be seen that the drain plpes of thescrapers 91 and 92 are connected by a coupling 102 to a pipe 103extending into the tank 39. Therefore, water in the tank will bereplenished. The drain pipe for the scraper 93 may also extend to thetank.

I have therefore provided an apparatus by means of which coating may beapplied to a strip of material, the coating then properly set by passingthe coated material through a water bath and the strip of material thenthoroughly dried and formed in a roll at the delivery end of theapparatus From the foregoing description of the construction of myimproved apparatus, the operation thereof and the method of applying thesame to use will be readily understood. It will be seen that I haveprovided a simple, inexpensive and eflicient means for carrying out theobjects of the invention.

While I have particularly described the elements best adapted to performthe functions set forth, it is obvious that various changes in form,proportion and in the minor details of construction may be resorted towithout departing from the spirit or sacrificing any of the principlesof the invention.

Having thus described the invention what is claimed is:

An apparatus for coating a strip of material comprising means forapplying a coating substance to the strip, means for applying water tothe coated strip to set the coating, means for wiping water from thecoated strip, a series of rollers for engagement by the strip afterbeing wiped and guiding the strip to a point of delivery, and scrapersengaging certain of said rollers for removing water deposited thereon bysaid strip, each scraper consisting of a trough extending longitudinallyof a roller, heads closing ends of the trough and having arms extendingtransversely of the trough and pivotally mounted near their ends tomount the trough for swinging movement towards and away from the roller,the trough being open along its side facing the roller and the headshaving their inner faces formed with grooves, a blade extendinglongitudinally in said trough with its ends seated in said grooves, saldblade having a side edge portion projecting 5 outwardly through the openside of said trough and sharpened to form a scraping edge, springsengaged with said arms to yieldably resist movement of the trough awayfrom the roller and retain the scraping edge 13 of the blade in closecontact with the roller,

and a drain leading from saidtrough.

In testimony whereof, I afiix my signature.

WILLIAM J. EISNER.

